THE SUITABILITY OF AMERICAN WOODS FOR PAPER PULP 31 
By Sulphite Process 
Reduces readily but unevenly. 
Unbleached pulp: Of good color and strength and fine texture, but shivy 
and pitchy. 
Yields: 45 to 50 per cent. 
Bleach required: 20 to 30 per cent. 
Uses to which pulp is suited: Wrapping and printing papers. 
By Sulphate Process 
Reduces readily. 
Unbleached pulp: Very strong and of fine texture. 
Yields: 45 to 50 per cent of strong pulp, 38 to 43 per cent of pulp for bleaching. 
Bleach required: More than 20 per cent in one stage, or 15 to 20 per cent in 
two stages. 
Uses to which pulp is suited: High-grade kraft wrapping papers and fiber 
board. 
By Mechanical Process 
Reduces fairly readily. 
Pulp: Grayish in color but of standard strength; somewhat pitchy. 
Power required: 40 to 50 per cent more than for white spruce. 
Uses to which pulp is suited: Limited chiefly by poor color and presence of 
pitch. 
Loblolly Pine (Pinus taeda) 
Other names in use.- — Old-field pine, rosemary pine, sap pine, Virginia pine, 
and bastard pine. The lumber is usually mixed with that of short-leaf pine and 
is sold as short leaf or North Carolina pine. 
Range. — South Atlantic and Gulf States from New Jersey, southern Delaware, 
eastern Maryland, and eastern West Virginia to central Florida; west to eastern 
Texas; northward into southwestern Oklahoma, Arkansas, and southern border 
of middle and west Tennessee. 
Oven-dry weight per cubic foot, green volume. — 30 pounds. 
Fiber length. — 3.0 mm. 
By Sulphite Process 
Reduces fairly readily. 
Unbleached pulp: Slightly darker than white spruce sulphite and with a 
decided reddish-gray tone; of fair strength, with rather coarse fibers; probably 
pitchy. 
Yields: 45 to 50 per cent. 
Bleach required: 20 to 30 per cent. 
Uses to which pulp is suited: Wrapping and printing papers. 
By Sulphate Process 
Reduces readily. 
Unbleached pulp: Of good strength. Fibers long and rather coarse. 
Yields: 45 to 50 per cent of strong pulp, 38 to 43 per cent of pulp for bleaching. 
Bleach required: 20 to 30 per cent in one stage, or 10 to 20 per cent in two 
stages. 
Uses to which pulp is suited: High-grade wrapping papers, fiber board, and 
book stock. 
From 1 to 10 gallons (in case of selected materials) of turpentine per cord of 
wood cooked may be recovered from the digester relief. 
By Mechanical Process 
Reduces readily. 
Pulp: Coarser and weaker than pulp from the spruces and inclined to be 
pitchy; color good from wood cut in the fall, poorer from wood cut in the 
spring. 
Power required : 50 to 60 per cent more than for white spruce, to attain same 
strength of pulp. 
Uses to which pulp is suited: Limited chiefly by poor color and presence of 
pitch. 
